Furnace door frame



FURNACE DOOR FRAME Filed Nov.

2 Sheets-Sheet l INVENTOR I I l I I I I l I I I I I I I I I l I I I I I l I I I I I I I I I I l I LJ IJ- |..|T III IIIIQII III ...m

IIIIIIIIIIII il Nov. 1o, 1931. L, R, MCA-FOO@ 1,831,461

FURNACE DOOR FRAME Filed NOV. 19, 1929 2 Sheets-Sheet 2 Patented Nov. 10, 1931 UNITED STATES PATENT OFFICE I LAWRENCE R. MCAFOOS, OF BELLEVUE, PENNSYLVANIA, ASSIGNOR '10 RELIAN STEEL PRODUCTS SOIVIIIAIN'Y,r OF PITTSBURGH, PENNSYLVANIA, A CORPORATION 0F IPENN- SYLVANIA.

nummer. Doon FRAME Application led November 19, 1929. Serial No. 408,320.

My invention relates to improvements in furnace door frames, and more particularly to furnace door frames of the character employed in openghearth furnaces and the like.

The prime object of the present invention is to provide a new and improved door frame of the type above specified, which may be Vformed of seamless or lapswelded tubing or 4thelike, and other hollow members, as distinguished from cast metal and sheet metalk structures, assembled and secured together to 'form a skeleton frame of efiicient construction embodying passages `for the desired circulation of a cooling fluid therein.

Further objects are, to provide a frame of skeleton construction, of Vrelatively light weight, that may be readily applied to and bination'with the seamless tubes, a structural steel member functioning to provide a rigid iframe, and means for securing the frame to a` Y furnace wall.

Additional objects and advantages will be-` come apparent from the following specification, taken in connection with the accompanyt ing drawings, wherein:

Fig. l 1s an elevational view partly broken away, of a door frame embodying my invention; n. y .y v

Fig. 2, a top plan viewk thereof; l Fig. 3, a vertical sectional viewv takenon the line III-III of Fig. -l,\showing the means for securing the frame to the furnace structure Fig. 4, an enlarged detail sectional view taken on the line IV-IV of Fig.`2, particularly showing the closure means for the upper end of a frame member; t t

Fig. 5, a perspective view of the upper end of a frame member, showing Vthe closure means detached; Y

rFig. 6, a horizontal sectionV on the line' VI-VI of Fig. l; and l Fig. y7, a lvertical section on vthe line VII-VII of Fig. 6.

ing, and are designed to be f Referring to the drawings, 2 designatesY the leg members of the skeleton frame. Members 2 areof sufcient length to extend from the bottom of the furnace door opening i to points well above the top of lsaidopeneach side of the opening A.

[As illustrated and as preferred, members 2 are formed of openended seamless drawn, tubing, having a rectangular cross section,

and each is provided witha passage 3 for the circulation of a cooling fluid therethrough. L designates a lintel or the lintel portion of positioned one on the frame. This lintel portion, as shown, is p i of U-shape in configuration, thus providing a central arched portion and depending lintel legs o, and is preferably formed of a seamless tube having a rectangular cross-section of somewhat smaller areav than the legs,4

proper.

TheA lintel portion l is placed between the leg members v2 in such a manner that the lower ends of the lintel legs 5 and the leg members 2 coincide, and openings 6 in the outer walls of the lintel leg portions register"V with similar openings 7 in the innermost walls of the leg members 2, the rear walls of i' the lintel legs and leg members being in alinement. In this position, the-leg portions ofV the lintel and legmembers are secured'tolv gether by stitch-welding along their'front and rear meeting edges, as at a, and by welding between said members and' leg portions,

as at In addition, the meeting walls bor- Y dering the openings 6 and 7 are welded, as at @,to provide a communicating fluid passage between the passage 3 and an interior fluid passage 8 ofthe said lintel, at each side of the frame. y,

The open lower ends of the portions 5 and the members 2 preferably have their edges beveled inwardly, as at 9, and are adapted to receive closure, members or plates 10. Said Y plates have their edges 11 beveled oppositely to the edges of the portions '5 and members 2, so that when the plates are inserted `within the ends thereof. a V-shaped groove is formed v to receive a'welding metal Z for securing the plates to said lower ends, and thereby seal them.

The open upper ends of the leg menibei's 2 are designed to be closed by closure members or caps l2, and for this purpose the edges ot' the legs are beveled, as at 13, for receiving the welding metal e betweeen said edges and the oppositely beveled'edges le ot the caps- 1Q. rThe caps are each iorinedwithl an aperHV tured extension 15 threaded to receivea-lluidv inlet conduit 16.

projects upwardly from the arch of the lintel portion el, and is preferably.formed et.

seamless tubing of the saine cross-section as that comrnising the lintel. bei` 1'? is centrally located with respect to the leg members 2, and is welded to the upper wall of the lintel portion, as at f, `said wall being provided with an opening 18 there throng-hte effect communication between the Vpassage 8 and a passage 19 of the 4member 17.

The upper end of the member i7 vpreterably terminates in the same plane as the upper ends ot `the leg members 2, vand is adapted to be closed by means of a closure having its .upper flange 21a co-extensive with the-upper ends oi the tubular members. Said upper iiange is cut away 0r recessed as vat 22 to permit the entrance of the leg members and the member 17. suliicient depth .to allow `the back walls of said members to contactwith the iront VfaceV of the intervening' web Q3 of the Z-bar. Then the members are so positioned. they are welded to the VZ-bai', as at g/ (see Fig. 5).

llieother iiange of the Z-bar entendsreai1` wardly and may be employed for securing `the frame to the furnace structure by bolts or other suitable means. However, I have shown an alternative metliod,1which consistsV g of clips 2% welded or otherwise secured to'tlie front face of the Zbar web 23, having openings therein to receive J-bolts 25. The hook portions or' said bolts-are adapted to engage a flange ot the skew channel 26 of the furnace structure, thereby providing a simple Yand durable mounting for the Vtrame on the Vfront wall of the furnace.

i .Due to thedifferent cross-sectional sizesot the lintel portion and the leg members7 and the positioning thereof, a guide or tracliway 27 is provided in the front portion of the frame, vhich may be employed for guiding a` A vertically extending tubular member li" Tubular meiuvThe recesses are otsliding door 28, shown in the broken lines of Fio'. 2.

s indicated by the arrows of Fig. 1, the Vfluid [circulation is as follows. Tater or other cooling medium is introduced into the `passages Y3 ofthe legV members 2 by means ot itlie 'inlet conduits i6, and' passed downwardly,

entering the passage 8 of the lintel portion .through the openings and AT. The water then paSfsesiIpwardly'tliroughthe passage 75 8 and 'enters the" passage 41'9 of the ,member 1T, Aandtlience upwardly therein, discharg- "ingby means of outlet conduit 20. By rea.-

son of the rectangular' cross section of the members, and the ciiciilationrjust described, S0 ythe steam pockets encountered in present practicev are eliminated. fThe embodimeiitot kseamless `tubingin :a skeletonE-frame Kof the vcharacter described, minimizes the possibility oiidamage to .the 'frainefbybemg struck by 85 the fur-nace charvinev machine or other heav i objects.V The strengtlrothetubular sections will be readily 4.understood:and should they Y be struck in 'the .saidiiiaiinei,}tliey will only be dcforined'or: dented, which vwill `not result 90 in thedestruction-ot the iframe. v

It `will be, seenroniFig. l Athat-the skeleton construction of my .traine provides vopenings B Ytherethiougli above the i lintel portion.

These openings permit repair ol the ifurnace f wall without the removal .ofthe frame, and also maybe employed orvthe 'insertion oi' a.

supplemental wall or ybrick-Work in the event .that-the front wall of kthe furnace Jtails during .-operation, without shutting down the-i ioo furnace. I..

YlVhile I-have shown oneforin ordoor frame and one formofseamlesstubing, it will be nnderstoodthat various modiiic'ation's thereoi'are contemplated, providedthey tallv with?lv 105 in .the scope of theffollowing claims.

I claim: l LA water cooled.furnaceridoor frame of skeleton construction comprising leg and lintelv portions formedV of tubing,jsaid leg-111g portions extending above-said lintel portions,

said lintel portions having dependinglegs united -by we ldslto the `frame legs proper, plates closing said leg portions and lintel .portions Aat the'` bottom, structural ineansil spaced above the lintel portion-connecting the frame leg portions, Vmeans'placing the legs of the frame in communication with the depending legs of the lintel portion at the bottom,

and inlet and outlet meansat the top of tlieiz( leg-and lintel portionsrespectively. p

; 2. A water cooled furnace door frame. of p skeleton construction comprising communieating leg and lintel portions formed ofltubing, said ileg vportions extending aboveV and-iZl below the lintel portion, said lintel portion having depending legs united 'by weldsto the frame legs properat lthe lower portions of the legs, ,plateswelded-.to the lower ends ol:

said trame and lintel legsto close them andiitf el lr) connect the portions, a cross structural member spaced above the lintel portion and connecting the upper ends of the legs, and means for causing a circulation of water through the tubular members;

3. A water cooled furnace door frame of,v skeleton construction comprising leg and lintel ortions formed of tubing said lintel or- P ma tion beine' of U-sha )e and havineits de endb Y a l ing leg portions united by welds to the legs proper, said legs proper projecting above the lintel, and plates closing the frame and lin-V skeleton construction comprising leg and lintel portions formed of tubing, said lintel portion being of U-shape and having its depending leg portions united by welds to the legs proper, plates closing the lower ends of the frame and lintel legs at the lower ends,

\ said legs proper projecting above the lintel,

a vertically extending tubular member projecting from the lintel and in open communication therewith, means to provide a circulatory communication through the tubular parts, and a cross structural member connecting the upper ends of said vertically extending tubular member and the legs.

5. A water cooled furnace door frame of skeleton construction comprising leg and low the lintel portion, lintel leg portions disposed adjacent the lower ends of the said leg portions, means for closing and connecting the legs and lintel portions at the bottom, means placing theleg portions and the lintel leg portions in communication at the bottom, a fluid inlet for a leg portion, av vertically extending tubular lfluid outlet member projecting from the lintel and in open communication therewith, and a structural member spaced above the lintel portion and connecting the tubular liuid outlet member and the leg portions.

' In testimony whereof I aix my signature.

LAWRENCE R. MGAFOOS.

lintel portions formed of seamless tubing of rectangular cross section, said lintel portion being of U-shape and having its depending leg portions united by welds to the legs proper, plates welded to and closing the lower ends of the frame and lintel legs at the lower ends, said legs proper projecting above the lintel, means to provide a circulatory communication through the tubular parts, and ak cross structural Z-member formed to receive the upper ends of the leg extensions into which the said ends are entered.

6. A water cooled furnace door frame comprising leg and lintel portions formed of tubing, said leg portions extending above and below the lintel portion, lintel leg portions disposed adjacent the lower ends of said leg portions, means for closing and connecting the legs and lintel leg portions at the bottom, means placing the leg portions and the lintel leg portions in communication at the bottom, inlet and'outlet means at the top of the leg and lintel portions respectively to provideV a downward passage of a cooling fluid through a leg and an upward passage of the l fluid through the lintel legs and lintel, and

structural means spaced above the lintel portion and connecting the leg portions.

y 7. A water cooled furnace door frame comprising leg and lintel portions formed of tubing, said leg portions extending above and be- 

